Neutron slowing down and transport in an infinite medium - II: the scalar flux at large distances/small lethargies

A companion paper has presented a generalized age theory expression for the scalar flux Phi/sup G//sub O/ (x, u) due to a plane isotropic source emitting neutrons in an infinite medium with cross sections that are constant in energy. The range of validity for this generalized age theory expression has also been determined as p = x/(2u) ≤ R(A), where R(A), the range of validity, is a function of the scatterer's mass. The purpose of this paper is to present the expression for the scalar flux Phi/sup G//sub O/ (x,u) in the complementary region in phase space, i.e., where p > R(A)